Home / 18,721.56-28,074.06-6,875.40

Finding the Fourth Proportional to 18,721.56, 28,074.06 and 6,875.40

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Solution

The fourth proportional to 18,721.56, 28,074.06 and 6,875.40 is: 10,310.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.56 : 28,074.06 = 6,875.40 : x
  2. Step 2: Convert to fraction form
    18,721.56/28,074.06 = 6,875.40/x
  3. Step 3: Cross multiply
    18,721.56x = 28,074.06 × 6,875.40
  4. Step 4: Simplify right side
    18,721.56x = 193,020,392.12
  5. Step 5: Solve for x
    x = 193,020,392.12/18,721.56
  6. Step 6: Final answer
    x = 10,310.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.